T28.90XS — Corrosions of unspecified internal organs, sequela
Is T28.90XS billable?
Yes, but T28.90XS is an unspecified code. T28.90XS is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, T28.90XS is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting T28.90XS — the more specific alternatives are listed below.
More specific alternatives
- T28.0XXSBurn of mouth and pharynx, sequela
- T28.1XXSBurn of esophagus, sequela
- T28.2XXSBurn of other parts of alimentary tract, sequela
- T28.3XXSBurn of internal genitourinary organs, sequela
- T28.5XXSCorrosion of mouth and pharynx, sequela
- T28.6XXSCorrosion of esophagus, sequela
- T28.7XXSCorrosion of other parts of alimentary tract, sequela
- T28.8XXSCorrosion of internal genitourinary organs, sequela
T28.90XS at a glance
| Code | T28.90XS |
|---|---|
| Description | Corrosions of unspecified internal organs, sequela |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "S" | sequela |
What does the 7th character "S" mean in T28.90XS?
In T28.90XS, the 7th character S means sequela. The 7th character is required for T28.90XS to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T28.90XS group to?
T28.90XS sits in MDC 09 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 604Trauma to the Skin, Subcutaneous Tissue and Breast with MCCmedical
- 605Trauma to the Skin, Subcutaneous Tissue and Breast without MCCmedical
How is T28.90XS listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T28.90, the nearest indexed parent of T28.90XS. Use them to find the family, then select the specific code.
- Corrosion › internal organ (injury) (acid) (caustic) (chemical) (lime) (external) (internal)
Code first — inherited from T28.9
The underlying condition below must be sequenced before T28.90XS. T28.90XS describes a manifestation and cannot be the principal or first-listed diagnosis.
- (T51-T65) to identify chemical and intent
Use additional code — inherited from Chapter 19
Report an additional code alongside T28.90XS to fully describe the condition. T28.90XS is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T28
Report an additional code alongside T28.90XS to fully describe the condition. T28.90XS is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T28.90XS, but a patient may have both at the same time. When documentation supports it, T28.90XS and the excluded code may both be reported.
How long has T28.90XS existed?
T28.90XS has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.